Had version 2.x (from GIMP 2.6.12) but it would crash, so I did a search and found that you updated for 2.7. Unfortunately your 2.7 version is not compatible with 2.8 (at least not the 64-bit version of GIMP). I get the error below. :)

Never got a response back unfortunately. Not gooat Script-fu, but might look at it to see where it's crashing and maybe fix it but more then likely I'll ask for help from the script-fu heavyweights here if Miran doesn't address the issue since it might have gotten abandoned. I like low frequency even and miss not having it (not for seamless texture but for HDR effects). :)

Runs further Saul, but still, as filsd indicated, still has issues. I did try to run Script-fu terminal to debug but it wouldn't open in terminal (just goes to show how novice I am to Script-fu; lol). :)